Abstract: A method for operating a sensor for detecting at least a portion of a measured-gas component having bound oxygen in a measured gas in an exhaust gas of an internal combustion engine. The sensor encompasses a sensor element including: a first pump cell; a reference cell; and a second pump cell. An electronic control device is connected to the sensor element; the first pump cell is connected using an electrically conductive connection to a first separate terminal of the device; the second pump cell is connected by an electrically conductive connection to a second separate terminal of the device; a measuring resistor is provided in the connection that connects the second pump cell to the second separate terminal; a current excitation and/or voltage excitation of the second pump cell is carried out using the control device to generate a measured signal at the measuring resistor.

Abstract: A method and a device are described for detecting at least a portion of a measuring gas component containing bound oxygen in a gas mixture, in particular in an exhaust gas of an internal combustion engine, in a measuring gas chamber by detecting a portion of oxygen that is generated by a reduction of the measuring gas component containing the bound oxygen, in the presence of molecular oxygen, in the device, which includes at least one first pump cell, one reference cell, and one second pump cell.

Abstract: A method and a device are described for detecting at least a portion of a measuring gas component containing bound oxygen in a gas mixture, in particular in an exhaust gas of an internal combustion engine, in a measuring gas chamber by detecting a portion of oxygen that is generated by a reduction of the measuring gas component containing the bound oxygen, in the presence of molecular oxygen, in the device, which includes at least one first pump cell, one reference cell, and one second pump cell.